Box-connector for electric installation.



APPLICATION FILED JUNE 4, 190B.

Patented Sept. 29, 1908,

7/4 wwzQrQd ends 8 thereof.

UNITED srATEs PATENT orEroE;

WHEELER H. VIBBER, OF NEW LONDON, CONNECTICUT, ASSIGNOR OF ONE-HALF TOTHE GILLETTE-VIBBER 00., OF NEW LONDON, CONNECTICUT, A CORPORATION.

BOX-CONNECTOR FOR ELECTRIC INSTALLATION.

No. scenes.

Specification of Letters Patent.

Patented Sept. 29, race.

To all whom it may concern:

Be it known that 1, WHEELER H. VIBBER, a citizen of the United States,residing at New London, in the county of New London and State ofConnecticut, have invented a new and useful Improvement inBox(lonnectors for Electric installation; and I do hereby declare thefollowing, when taken in connection with the accompanying drawings andthe letters of reference marked thereon, to be a full, clear, and exactdescription of the same, and which said drawings constitute part of thisspecification, and represent, in

Figure 1 a view-in side elevation of my improved box-connector. Fig. 2an end View thereof. Fig. 3 a detached view in longitudinal section ofthe bushing. Fig. 4: a detached view of the yielding binding-strap andbinding-screw. Fig. 5 a detail view of the binding-strap as developed.

My invention relates to an improved boxconnector for use in electricinstallation, the object being to secure a superior grip upon a cab e ora conduit and to avoid crushing or deforming the latter in so doing.

With these ends in view my invention consists in the construction andcombination of parts to be hereinafter described and pointed out in theclaims.

in carrying out my invention as herein shown, I employ what for want ofa better term i shall call a bushing 2 which is formed at what i maycall its bushing-end, with a reduced externally threaded stem 3 providedwith a binding nut 4, it being understood that the said stem 3 is passedthrough a suitable hole in the outlet-box or cabinet (not shown) afterwhich the nut i will be applied to its projecting inner end for firmlyseating the shoulder 5 at the base of the stem 3 upon the outer face ofthe said box or cabinet which may be of any construction. I Theopposite, or what i shall call, the conduit-end of the bushing, isformed with a transverse slot 6 for the reception of a yieldingbinding-strap '7 oval in general form and having widened ends 8 formedwith perforations 9 for the reception of a binding-screw 10 having aslotted head 11, the screw being furnished with a nut 12 interposedbetween the inner faces of the ends 8 and that portion 13 of the bushin2 lying between the strap 7 and the widens Shoulders 1 1 formed betweenthe strap proper and its widened ends engage with the outer face of thebushing near the ends of the slot 7, and prevent the -der 15 formedwithin the strap from turning far enou h to carry the screw 10 out ofthe rangeof the portion 13 of the bushing as described. An annularshoulbushing forms a contracted opening 16 for the wires which are thuscentered in the bushing.

It will be understood that after an armored cable or a conduit isintroduced into the conduit-end of the bushing, the screw 10 is operatedto move the strap 7 in the slot 6 and therefore transversely to the axisof the bushing, whereby the. cable or conduit is gripped by the strapand drawn by the same against the art 13 of the bushing; VJhen the strapis t us put under tension by means of its bindingecrew 10, it not onlydraws the cable or conduit against the inner face of the part 13 of thebushing, but the strap itself tends to conform to the shape of the cableor conduit, and thus secures a firm grip thereupon. Furthermore, in casea fibrous conduit is used, the stra by yielding and conforming thereto,will dimly hold it without crushing it and deforming it, and s0 closingor contracting its interior space.

l/Vhile I have shown my improved yielding strap as applied to a straightbox-connector, it may, if desired, be employed in conjunction with abox-connector of elbow form. I

1 claim 1. in a box-connector for use in electric installation, thecombination with a bushing formed with a transverse slot, of a yieldingbinding-strap entering the said slot and furnished with a binding-screwwhich'engages with a bushing to function the strap.

2. in a box-connector for use in electric installation, the combinationwith a bushing provided with a threaded stem furnished with a nut andformed with a transverse slot, a yielding binding-strap entered into thesaid slot and having perforated ends wider than the bodyof the strap,and a binthng-screw passing .through the perforated ends of strap andcarrying a nut which is interposed between the said bushing and theperforated ends of the strap.

in testimonyrwhereof, i have signed this specification in the presenceof two subscribing witnesses. I

WHEELER ii. vrEEEn. Witnesses: M. B.- LEwis, N. d. Nnniiss.

